Fan mounting



Y L 1 i P. SCHLUMBOHM 2,808,979

FAN MOUNTING Filed Jan. 16. 1956 A: MW-4 INVENTOR United States Patent FAN MOUNTING Peter Schlumbohm, New York, N. Y.

Application January 16, 1956, Serial No. 559,151

2 Claims. (Cl. 230-47) The invention refers to a fan mounting and, more specifically, the invention refers to a fan mounting with a centrifugal impeller and a tangential exhaust. With all fans the mounting is a problem of adjusting the angle of the direction of the air propelled by it, and with a centrifugal blower this problem becomes still more urgent in view of the limited cross section of the jet of air which leaves the fan.

The invention is illustrated in Fig. 1, Fig. 2 and Fig. 3 of the accompanying drawings, by way of example. All three figures show the same product but arranged in different positions. Fig. l is a front view, in perspective. Fig. 2 is a side view, in perspective. Fig. 3 is a top view of Fig. 1, in perspective.

Figure 1 shows a shaft-driven fan 1 in which the shaft 2 carries a centrifugal impeller 3 which is surrounded by a cowl 4 which collects the air and throws the air out tangentially through an ejection slot 5. The object of the invention is to adjust the position of this ejection slot 5 to the requirements of the various applications of the fan. These applications vary, for instance, as follows:

As a window fan, a fan shall pump air from the outside into the room, or, alternatively, pump air from the room to the outside.

As a table fan, the tangential jet of the centrifugal fan shall be directed in a plane vertical to the plane of the table or, alternatively, in a plane parallel to the plane of the table or at an angle to the plane of the table.

Following the invention, these problems are solved by a new mounting. This mounting comprises a substantially cylindrical round-bottom U-shaped casing 6 which is arranged with its long axis in a plane 90 from the plane of the shaft 2.

This cylindrical round-bottom U-shaped casing 6 is, in its simplest materialization, formed by a bent sheet of material which, at its longitudinal edges, is flattened, forming two plane sections 7, 8. These two sections 7, 8 leave a gap 9 for the shaft 2 of the motor 16 which itself is enveloped by the cylindrical round-bottom U- shaped casing 6. The gap 9 also forms an air intake for the one side of the impeller 3 adjacent to the motor. The second air intake for the impeller 3 is formed by an opening 10 in the front wall 11 of the cowl 4.

The cylindrical round-bottom U-shaped casing 6, as shown in the figures, is of greater length than the diameter of the cowl 4 to which it is attached concentrically. As shown in Figure 1, this allows the use of the cylindrical round-bottom U-shaped casing 6 as a vertical stand for the fan with either end of the cylindrical round-bottom U-shaped casing 6 being used as a base. Depending on which end of the cylindrical round-bottom U-shaped casing 6 is used as a base, the position of the exhaust slot 5, and with it the direction of the jet of air, will be changed 180'.

At each end the cylindrical round-bottom U-shaped casing 6 is provided with two perforations 12, 13 which are positioned above the center of gravity of the fan.

Hanging means such as a rawhide 14, 14' can be strung through these perforations and the fan can thus easily be hung on a nail or on a coat hanger. Again,

2,808,979 Patented Oct. 8, 1957 ice choosing one of the two ends of the cylindrical round bottom U-shaped casing 6 for hanging the fan allows the choice of two directions of the air flow.

Figure 2 illustrates how the cylindrical round-bottom U-shaped casing 6 rests longitudinally on a table. binding means 14, 14 are complemented by a perforated cork ball 15, through which each rawhide is strung. This cork ball has frictional contact with the outer wall of the scroll 6 and with the table. Inasmuch as these cork balls can slide on the rawhide, one can change their position and thereby can change the angle at which the air jet leaves the exhaust slot 5. If, as shown in Figure 2, the jet shall blow in a plane parallel to the plane of the table top, one cork ball is arranged on each side of the cylindrical round-bottom U-shaped casing 6.

Aside from the advantages of this cylindrical roundbottom U-shaped casing 6 for adjusting the angle and direction of the air jet, this cylindrical round-bottom U- shaped casing 6 offers very important additional advantages.

In all fan construction three problems are outstanding:

(1) Noise control, which means vibration control.

(2) Control of the motor heat by providing adequate air flow over the motor.

(3) Preventing scratches and surface damage caused by the base of the motor when placed on a table top.

By making the casing 6 from a flexible sheet material, the casing becomes a noise dampener.

By enveloping the motor like a chimney, and by providing the gap which lets the impeller take in air from the space of that chimney, part of the air taken in by the fan is forced to flow over the motor, cooling it well.

By chosing rubberized material for the casing 6, the casing will not scratch a polished furniture top in any position.

In all its features this mounting appears to be novel and unconventional. Beyond the example shown, the idea of this casing mounting of a fan can be applied to conventional fans with the same advantages cited in this example.

I claim as my invention:

1. A fan having a drive motor and a mounting base for said fan and motor, a shaft secured to said motor, an air propelling means mounted on said shaft, a housing surrounding said air propelling means and having oppositely disposed inlets, one in the upper and lower side thereof and a peripheral outlet therein, said mounting base comprising an elongated round-bottom U-shaped casing having a long axis normal to the shaft and a short axis parallel to the shaft, said casing having walls extending along the long axis beyond the housings overall dimension and forming a pair of open opposite ends, the open side of the elongated round-bottom U-shaped casing being secured to the lower side of said housing covering said lower inlet and said motor, the pair of open ends and the open side of the casing providing communication between the air propelling means and the atmosphere, the contour of the round-bottom U-shaped casing being such that the fan may rest on a table alternatively on one of the opposite open ends of the round-bottom U-shaped casing or on the round-bottom thereof.

2. A fan as claimed in claim 1, wherein said roundbottom U shaped casing is provided with ball elements secured to the outer surface of the round-bottom and forming wedge-like stop elements for contact with a table whereby the round-bottom surface of the casing may serve as the support base for the fan.

References Cited in the file of this patent UNITED STATES PATENTS 1,039,025 Carroll Sept. 17, 1912 The 

